page_title: Immune system
hierarchical_section_title: Immune system
caption_attribution_description: Deutsch: Eine REM-Aufnahme eines neutrophilen Granulozyten (gelb) beim Aufnehmen von Anthrax-Bakterien (orange).Maßstab: Der weiße Strich links unten ist 5 Mikrometer lang. English: Neutrophil engulfing anthrax bacteria, taken with a Leo 1550 scanning electron microscope. Scale bar is 5 micrometers. Français&#160;: Un neutrophile (en jaune) phagocytant des bacilles du charbon (en orange). Photo prise avec un microscope electronique. Echelle: 5 microns. Nederlands: Elektronenmicroscopieopname van fagocytose tussen een fagocyt (geel) en miltvuurbacteriën (oranje) Español: Neutrófilo (en amarillo) engullendo una bacteria de carbunco o ántrax (en naranja). Fotografía tomada con un microscopio de electrones Leo 1550. La escala son 5 micrómetros. Tiếng Việt: Hình ảnh chụp bằng kính hiển vi điện tử quét cho thấy vi khuẩn Salmonella (nhuộm màu đỏ) xâm nhập vào tế bào của con người. Salmonella là tác nhân gây ra sốt thương hàn và ngộ độc thực phẩm. 中文（台灣）‎: 嗜中性白血球正在吞噬鼠疫桿菌。此電子顯微鏡影像由Leo 1550掃描式電顯拍攝。左下角比例尺為5微米。
context_page_description: The immune system is the set of tissues which work together to resist infections. The immune mechanisms help an organism identify a pathogen, and neutralize its threat.
  The immune system can detect and identify many different kinds of disease agents. Examples are viruses, bacteria and parasites. The immune system can detect a difference between the body's own healthy cells or tissues, and 'foreign' cells. Detecting an unhealthy intruder is complicated, because intruders can evolve and adapt so that the immune system will no longer detect them.
  Once a foreign cell or protein is detected, the immune system creates antibodies to fight the intruders, and sends special cells to eat them up.
context_section_description: The immune system is the set of tissues which work together to resist infections. The immune mechanisms help an organism identify a pathogen, and neutralize its threat.
  The immune system can detect and identify many different kinds of disease agents. Examples are viruses, bacteria and parasites. The immune system can detect a difference between the body's own healthy cells or tissues, and 'foreign' cells. Detecting an unhealthy intruder is complicated, because intruders can evolve and adapt so that the immune system will no longer detect them.
  Once a foreign cell or protein is detected, the immune system creates antibodies to fight the intruders, and sends special cells ('phagocytes') to eat them up.
caption: A scanning electron microscope photo of a single neutrophil (in yellow), engulfing some anthrax bacteria (in orange).
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